In this song, she tells the story of a relationship between a "sk8er boi" (skaterboy) and a more preppygirl who does ballet. Although both of them "want" each other, the girl rejects him against her own secretfeelings because of peer pressure. In the end, the skater boy becomes famous and is with another punk girl (Avril sings in that girl's point of view) who cares for him, leaving the preppy girl behind.
The music video begins with what may be the "Sk8er Boi" in the alley of a city with a bunch of spray paint on the ground. The music video goes along with posters that have a star on them advertising a concert Avril hosts, where people use their cars and amplifiers to have the concert on the streets. The concert gets so wild the police come in trying to stop it. At the end of the video, Avril crashes her guitar into the car windshield. A police helicopter comes in, leaving a mystery as to what they will do.